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Monumental Consolidated Quartz Mine

Past Producer in Del Norte county in California, United States with commodities Gold, Copper, Iron, Arsenic, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10086456
MRDS ID X007555
Record type Site
Current site name Monumental Consolidated Quartz Mine

Geographic coordinates

Geographic coordinates: -123.79476, 41.99149 (WGS84)
Elevation 914
Relative position 1.7 MI. NW OF SETTLEMENT OF MONUMENTAL, ON SHELLY CREEK

Site location context

Political divisions (FIPS codes)

Del Norte(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Shelly Creek Ridge(quadrangle 1:24,000 scale)

Happy Camp(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Smith(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Six Rivers National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Del Norte

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 018N 003E 01 NW OF NW California

Comments on the location information

  • UTM EST. NW 1/4 NW 1/4.

Commodities

Commodity Importance
Gold Primary
Copper Tertiary
Iron Tertiary
Arsenic Critical Tertiary
Lead Tertiary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Alteration

  • (Local) Ore Is Soft And Leached Near Surface, But Passes Into Hard, Arsenopyrite Ore At Depth

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Galice Formation;Galice Formation
    Rock description Galice Formation;Galice Formation

Nearby scientific data

(1) -123.79476, 41.99149
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault

Ore body information

  • Dip 70 S
    Thickness 1.22M
    Depth to bottom 30.48M

Controls for ore emplacement

  • Fault

Comments on the geologic information

  • VEINS ASSOCIATED WITH E-W CONTACTS OF GALICE (?) SLATE AND GREENSTONE

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1901

Mining district

District name Monumental

Land status

Ownership category National Forest

Comments on the production information

  • ORE IS SAID TO AVG. $40/TON, WITH HIGH-GRADE ORE VARYING FROM $100-120/TON. NO OTHER PRODUCTION RECORD FOUND.

Workings at the site

  • Type of workings Underground
    Name of workings 100-FT LEVEL
    Length 1066.8M
    Overall depth 30.48M
  • Type of workings Underground
    Name of workings PROSPECT DRIFT
    Length 9.14M
  • Type of workings Underground
    Name of workings PROSPECT DRIFT
    Length 12.19M
  • Type of workings Underground
    Name of workings SHAFT
    Length 73.15M
    Overall depth 73.15M

Comments on the workings information

  • 2-COMPARTMENT SHAFT, 240 FT. DEEP; INCLINE TO 100 FT. LEVEL; THREE QUARTERS OF A MILE OF DRIFTS ON 100 FT LEVEL; RAISE TO SURFACE; WINZE FROM 100 FT. LEVEL; 6 PROSPECT DRIFTS, 30-40 FT. LONG MILLSITE.

Comments on development

  • ECON.COM: SHIPPING AND SMELTING COSTS OF ORE WERE ABOUT $17/TON. ORE WAS UNPROFITABLE TO SHIP BEFORE CONCENTRATING

Reference information

Bibliographic references

  • Deposit

    OBRIEN, J.C., 1952, MINES AND MINERAL RESOURCES OF DEL NORTE COUNTY, CALIF.: CALIF. JOUR. MINES AND GEOLOGY, V. 48, NO. 4, P. 278

  • Deposit

    LAIZURE, C. MCK., 1925, MINES AND MINERAL RESOURCES OF DEL NORTE COUNTY, CALIF: CALIF. JOUR. MINES AND GEOLOGY, V. 21, NO. 3, P. 290-291

  • Deposit

    LOWELL, F.L., 1913, DEL NORTE COUNTY, CALIF: CALIF. JOUR. MINES AND GEOLOGY, V. 14, P. 389-390

  • Deposit

    MAXSON, J.H., 1933, ECONOMIC GEOLOGY OF DEL NORTE AND SISKIYOU COUNTIES, NORTHWESTERNMOST CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, V. 29, P. 143-144

  • Production

    OBRIEN (1952) MAXSON (1933) GOODWIN (1957)

General comments

Subject category Comment text
Deposit VEIN, 4 FT. THICK. ORE CAME FROM STOPE ABOVE 100 FT. LEVEL, ABOUT 40 FT. EAST OF SHAFT. TWO VARITIES OF ORE; A HARD ROCK AND A SOFTER ORE OF LOW-GRADE, ARE FOUND.
Deposit 165 ACRES. PATENTED. 8 CLAIMS ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Editor 14-MAR-1994 Mosier, D.L. U.S. Geological Survey CORRECTED LAT.-LONG., SEC. FRACTION, DEPOSIT TYPE, WORKINGS, LOCAL STRUCTURE, CONC/ENRICH, COMMODITIES.
Reporter 01-AUG-1980 Nelson, Scott C. (Albers, John, P.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.